Let SkBenchmark classes specify that they do no rendering.
Doing this gives us a 15-20% speedup in bench cycle time.
Here again I'm just picking the easy targets.

http://codereview.appspot.com/6500115/



git-svn-id: http://skia.googlecode.com/svn/trunk@5525 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/RTreeBench.cpp b/bench/RTreeBench.cpp
index d13d887..e1885c3 100644
--- a/bench/RTreeBench.cpp
+++ b/bench/RTreeBench.cpp
@@ -35,6 +35,7 @@
         if (fBulkLoad) {
             fName.append("_bulk");
         }
+        fIsRendering = false;
     }
     virtual ~BBoxBuildBench() {
         fTree->unref();
@@ -91,6 +92,7 @@
                            SkBENCHLOOP(NUM_QUERY_RECTS)), fBulkLoad);
         }
         fTree->flushDeferredInserts();
+        fIsRendering = false;
     }
     virtual ~BBoxQueryBench() {
         fTree->unref();